add validatefilename method
rafactoring
Merge remote-tracking branch 'origin/wmy_local'
small change
fix error of add command
refactoring
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add decription to tower
Merge branch 'master' of https://github.com/zhaozheid/CCD_SOEN6441_TD
Delete the useless method in mainscene
Merge remote-tracking branch 'origin/wmy_local'
remove the unused imports in MainScene
Merge remote-tracking branch 'origin/wmy_local'
remove the unused import in NewMapScene
Merge remote-tracking branch 'origin/wmy_local'
merge two parts of similar codes to a method
Merge remote-tracking branch 'origin/wmy_local'
add description
Merge branch 'master' of https://github.com/zhaozheid/CCD_SOEN6441_TD
Merge branch 'master' into zz_local